1. Install a subversion client (optional, but recommended)
2. Obtain the project source code from the repository
3. Configure _Mathematica_ so that it will find the package
4. Install Lilypond (optional, but highly recommended)
5. Open and evaluate the demo notebook to verify that everything works
The project source code should also be updated frequently to stay in sync with new developments.
Development of the MusicTheory package is done in the Mac OSX environment. In theory, the necessary components are available for other platforms, but they have not been tested. Use under Linux should be straightforward, Windows may require some modifications.